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Impact of Proper Maintenance of Combined Sewer Overflow System on Flooding in the City of Camden

Camden, NJ, USA
Jersey Water Works
Contact Partner
In Collaboration With
Camden County MUA

Project Status

Operational since 2017

Challenges Addressed

Stormwater Management
Economic Inequality
Asset Management


Sustainable city

Funding / Financing

Utility rates

Project Type


At a Glance

The proper operation and maintenance of Camden’s sewer system is an important component of its efforts to mitigate CSOs and flooding. The results are instructive for those seeking low-cost technology-based controls for reducing the magnitude and frequency of CSOs.

Problem Addressed

In order to reduce or eliminate flooding associated with CSOs, CSO permittees need to reduce community and street flooding, ensure proper operation, maintenance and management of existing infrastructure and provide opportunities for green infrastructure.

Camden County Municipal Utilities Authority used/is using Proper Cleaning and Maintenance to address this/these challenge(s).

Solution(s) Used

The model finds that the ability of the CSS to transmit flows to the WPCF and CSO outfalls is weakened by the sedimentation in the trunk and outfall sewers, driving increased community and street flooding due to CSS backups. The model predicts that 90 percent of the flooding problem could be eliminated in a normal year of rainfall by proper cleaning of the system. This demonstrates the importance of effective and consistent maintenance of the existing combined sewer system.


  1. When sewer pipe obstruction levels are reduced from 75 percent to 25 percent, flooding drops by over 90 percent.

Who Should Consider?

CSO communities, Sewer utility executives, Mayors

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